OSA devices connect to z/OS LPARS (logical partitions) through interfaces called ChPIDs (channel path IDs).
One z/OS box can be configured to host multiple LPARs. Multiple LPARS may reach a network through a single OSA box. Any one LPAR may reach multiple networks through multiple OSA boxes.
An OSA device has a manager, a mainframe system with access to configuration and performance data via the OSA’s MIB (management information base).
OSA usage data also comes from the TCP/IP stacks connected to OSA devices, much like usage data for any other interface.
VIP consolidates data from all sources, providing complete details regarding OSA configuration, traffic volumes, and performance.